Despite the persistent debate over whether cheerleading should be classified as a sport, injuries in the activity are becoming so prevalent that they are now second only to football. As Laura Ling reports, there has been a shift in cheerleading ever since the competitive form started to be televised in the 1980's. No longer just pompoms and chants, cheerleading has grown akin to gymnastics. Since it's not a "sport," there are no trainers, mats, or regulations and the results are downright dangerous. In the studio, Madeleine Brand talks with Pulitzer Prize winning author Lawrence Wright about his new book examining Scientology, "Going Clear".